FIELD: physics.
SUBSTANCE: device is a metallic shield with regular openings, placed in front of engine turbine blades, forming a double-wall with the surface of the channel and held by spacers. Inside the shield and coaxially with it, there is a pair of identical single-thread wire cylindrical spirals with different winding directions. The median values of effective scattering area are reduced (on probability level of 0.5) in the sector of angles of location 0±60° relative the normal to the opening of the channel from 2 dB to 16 dB in the wavelength range from centimetres to decimetres.
EFFECT: reduced effective scattering area of the channel of aircraft engine.
24 dwg
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